And that was my point. The "hot item" for USA during 2010-2012 was Kinect and affected a lot Wii (for a lot of different reasons too i admit) and PS3 sales. In Europe Kinect was not that big of a deal and PS3 was not affected in consequence.
Switch is having the same effect on XBO and PS4 sales in USA like Kinect had those years. It's the "hot item" now. It's the main selling point in every US videogame shop for this holiday season. It grabs all the attention, and people can spent so much money in videogames in the holidays....If you spend 300$ in a Switch, there's a lot less chances you buy a PS4 or XBO then.
It seems like there's a misunderstanding here. The charts pretty explicitly show that PS3 wasn't affected by Kinect in either the US or Europe, even as Xbox 360 skyrocketed in the US. Kinect didn't steal sales from PS3, it attracted sales from an audience that would not have purchased either of the HD twins otherwise.
The fact that you mention Wii actually detracts from your own argument. If you think Kinect caused a decline in Wii sales, then you acknowledge that it was the Kinect, rather than the base Gen 7 consoles, that had an overlap in audience with the Wii. This overlap does not exist between PS4 and Switch, because nothing like Kinect exists for the Gen 8 consoles.